firmware: arm_scmi: Quiesce notifications before teardown

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/firmware/arm_scmi/driver.c",
                        "drivers/firmware/arm_scmi/notify.c",
                        "drivers/firmware/arm_scmi/notify.h"
                    ],
                    "versions": [
                        {
                            "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
                            "lessThan": "6778bcabd2e0c32f73476f0bc6369013692540be",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
                            "lessThan": "2aac23bc0a79af41104d99823bb250fae92ba144",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
                            "lessThan": "5e30d3d16d1a9e599be4dcea872874e65e2c277b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e",
                            "lessThan": "8e49055d0d495c9c07575ad8e111d9eaf0efb13f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/firmware/arm_scmi/driver.c",
                        "drivers/firmware/arm_scmi/notify.c",
                        "drivers/firmware/arm_scmi/notify.h"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }